4mmm

FYI, purchased the Urbino tactical stock for my M2 during the Xmas holidays and just getting around to install it and also have the same issues (won't slide all the way in). Additionally it looks like the end of the Urbino Mesa Tactical stock tapers/bevels inward more so than the receiver end of the M2. To me it looks quirky and not completely smooth across that section. I will take a look at the other thread. Thanks gents.